Hi opjose, swapped out the burner for a nice -
12 speed unit. i obtained for free. and it now works. strange the old one still worked in windoze though. perhaps linux is less tolerent of impending hardware failure.
I couldn't justify spending money on this system as it's an old bp6 which started my love affair with smp sytems hence me hanging onto it, i have two newer systems and am saving hard to get a dual opteron rig.
To answer your? yes the system became totally unstable (grind to a halt) for about five minutes after which point the system shut down irq15 and it would run slowly thereafter.
Thanks again for your time opjose.
Trebor